noun
important point; key location
Used for a strategically important point, especially on a route or in a plan.
この交差点は交通の衝だ。
This intersection is a key point for traffic.
noun
important role; key responsibility
Refers to a crucial role or responsibility someone holds.
彼はプロジェクトの衝を担っている。
He plays a key role in the project.
noun
Technical term in astronomy for when two celestial bodies are on opposite sides of the sky.
See also: 合 (ごう)
火星が衝の位置にある。
Mars is at opposition.